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<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Tango: Airlines use one of the following to log the arrival of their flight: 1)Parking brake set. 2)Main cabin door is opened. 3)Main engines turned off.</font> The block-in time is officially the time that the aircraft comes to a stop at the arrivial gate. When the times are recorded automatically by ACARS the ACARS needs a way to determine when that has occurred. The ACARS will record the time whenever the parking brake is set but it won't transmit that time until the cabin door is opened. When the cabin door is open the ACARS will transmit the last parking brake set time. The parking brake is set within two or three seconds of the time that the aircraft comes to a stop so that's pretty accurate. Nobody uses "door open" or "engine shutdown" time as block in. |
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by terenz: [B]I suspect arrival time is when the a/c comes to a stop (and as you say, engines shut down) where pax can disembark. If there's a customs holdup (arriving at AA's JFK terminal before 6am), or if the jetway is broken or there's not one to run it. it's not the airline's fault.[B]</font> On-Time statistics are valuable in comparison, rather than as an absolute value, so theoretically, all airlines will be equally affected by events beyond their control. In fact, in case you didn't know, the Federal Statistics are only gathered a few days per month, and even then from only a few airports. They try to spread out the airports to make sure that everyone is treated equally. |
LarryJ: Some airlines do use "door open" in their reporting to the FAA for their on time arrivals. This was written up in the WSJ last year.
There have been several times when I take the red eye from SEA to DFW that when the plane arrives into DFW, there is no ground crew to pull up the jet bridge. The plane pulls into the gate and shuts down the engines and we have waited for upwards of 15 minutes sometimes before someone comes out to open the door--- [This message has been edited by Tango (edited 12-23-2002).] |
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Tango: LarryJ: Some airlines do use "door open" in their reporting to the FAA for their on time arrivals. This was written up in the WSJ last year.</font> What airlines do you think use the door open time? I'll check with some pilots from those airlines to see. A system such as you describe would negatively effect the carriers on-time statistics and would increase their crew costs (since crews are paid until block in). Why would an airline use such a system? [This message has been edited by LarryJ (edited 12-23-2002).] |
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